package com.haha.hahaforhaha.utils;

import androidx.annotation.NonNull;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Created by hah on 2017/11/10.
 */

public class ThreadPoolUtils {

    // 线程池核心线程数
    private static int CORE_POOL_SIZE = 8;

    // 线程池最大线程数
    private static int MAX_POOL_SIZE = 100;

    // 额外线程空状态生存时间
    private static int KEEP_ALIVE_TIME = 10000;

    // 阻塞队列。当核心线程都被占用，且阻塞队列已满的情况下，才会开启额外线程。
    @NonNull
    private static BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<Runnable>(10);

    // 线程工厂
    @NonNull
    private static ThreadFactory threadFactory = new ThreadFactory() {

        private final AtomicInteger integer = new AtomicInteger();

        @NonNull
        @Override
        public Thread newThread(Runnable r) {

            return new Thread(r, "myThreadPool thread:" + integer.getAndIncrement());
        }
    };

    // 线程池
    private static ThreadPoolExecutor threadPool;

    static {

        threadPool = new ThreadPoolExecutor(CORE_POOL_SIZE, MAX_POOL_SIZE,
                KEEP_ALIVE_TIME, TimeUnit.SECONDS, workQueue, threadFactory);
    }

    /**
     * 从线程池中抽取线程，执行指定的Runnable对象
     *
     * @param runnable
     */
    public static void execute(@NonNull Runnable runnable) {

        threadPool.execute(runnable);
    }

}
